Each museumnacht visitor had to place his or her finger in an RFID-tagged petri dish. They included information such as their name, and the location they visited before coming to Mediamatic. The visitors then linked their petri dish to their Facebook or Mediamatic profile using an ikCam. These petri dishes together made up the Bio-sample Wall. Photo made during Nacht van de Paddestoel, museum night 2011. Photo made during the Nacht van de Paddestoel on Museum nacht. Photo made during the Nacht van de Paddestoel on Museum nacht.